R.J.P. Alarm Systems
Supplies and installs intrusion and fire alarm systems to commercial and residential customers. Norfolk, England.
http://www.rjpalarms.co.uk/

Guardian Digital Internet Defense and Detection System
Internet Detection and Defense System for EnGarde Secure Linux analyzes network traffic for malicious activity. Regularly updated attack signatures, data correlation and real time even reporting provides bulletproof protection for your network.
http://store.guardiandigital.com/html/eng/products/software/idds_overview.shtml

Minnesota Burglar & Fire Alarm Association
A local non-profit organization to provide information about alarm system standards to consumers and alarm professionals.
http://www.mnbfaa.org/

Intrusion detection projects at UC Davis
Anomaly Detection in Database Systems, Common Intrusion Detection Framework, Intrusion Detection and Isolation Protocol / IDIP, Intrusion Detection for Large Networks, Misuse Detection and Workshop for Intrusion Detection and Response Data Sharing.
http://seclab.cs.ucdavis.edu/

Intrusion Detection User Group
A group mailing focusing on security information management, intrusion response, intrusion detection, intrusion prevention, intrusion management and honeynets/honeypots.
http://idug.cryptojail.net

Bosch Security Systems
Bosch Security Systems: CCTV, Intrusion detection, Congress systems, Access Management, Fire detection, Public Address, on-site paging. dect, congress, fire, intrusion, access, public address, call center, call centre, bss
http://www.boschsecuritysystem.com/

Firestorm Network Intrusion Detection System
Firestorm is a high-performance GPL-licensed network intrusion detection system (NIDS). Features include being fully pluggable, easily configurable, and an extremely scalable signature engine.
http://www.scaramanga.co.uk/firestorm/

System Design Laboratory Intrusion Detection
Research institute actively involved in intrusion-detection research since 1983. Research focuses on EMERALD: Event Monitoring Enabling Responses to Anomalous Live Disturbances, a system designed to detect and respond to network attacks.
http://www.sdl.sri.com/programs/intrusion/

eTrust Intrusion Detection
Computer Associates solution intended to incorporate a network intrusion management and prevention system, real-time session monitoring, and Internet web filtering.
http://www3.ca.com/solutions/Product.aspx?ID=163

Razorback
InterSect Alliance provides software and services relating to audit log/eventlog/event log collection, analysis, reporting, distribution and archive, primarilly through the SNARE series of tools. Snare provides infrastructure that you can use to meet local and federal security requirements such as DCID/DIAM, GBLA, NISPOM Chapter 8, C2/CAPP, Sarbanes Oxley, HIPAA, ACSI 33, Danish Standard DS-484:2005, and California Senate Bill 1386
http://www.intersectalliance.com/projects/RazorBack/